“Mariah was drinking through her pregnancy — even while she was nursing,” Morgan, who has not spoken to Mariah in two years, said via Radar. “I can’t say that I have ever been around her when she was sober, and that’s very scary.”

Mariah and Morgan Carey in 1991. (Photo Credit: Getty Images)

The pair allegedly grew estranged because “she’s pushed away the only people who’ve been trustworthy.”

However, that does not mean he has stopped caring for his famous sister!

“If my sister turns up dead … I’m not going to look the other way!” Morgan continued. “Anyone who’s filling her glass is jeopardizing her life!”

Morgan went as far as to claim “she’ll die just like Whitney Houston!”

As for her failed union with 34-year-old Nick Cannon, Morgan hardly seems surprised.

Former couple Mariah Carey and Nick Cannon. (Photo Credit: Getty)

“Nick listened to people who said, ‘Get with Mariah, she thinks you’re cute, have kids and ride it to the bank,'” he explained. “Nick was there for the cash from day one. He doesn’t give a damn about Mariah.”